The special high-energy and high ozone UV beam is used to irradiate the exhaust gas, so that the molecular chain of organic or inorganic macromolecular odorous compounds can react with ozone under the irradiation of high-energy UV beam to generate low molecular compounds, such as C02, H20, etc. Low investment cost, wide application range, high purification efficiency, simple operation, good deodorization effect, stable equipment operation, small land occupation, low operation cost, and no secondary pollution.